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| author | hev <wangrui@loongson.cn> | 2024-07-30 14:22:24 +0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-07-30 14:22:24 +0800 |
| commit | 3e2631c9c62990467eca3e173f714367d7e7c0dd (patch) | |
| tree | b1fd6294c5cd11c8b33665ba9a1a4a79f407c7de /llvm/lib/Target/LoongArch | |
| parent | 28f9575b41ce5a184baeaab95f5db74fb3ad176f (diff) | |
| download | llvm-3e2631c9c62990467eca3e173f714367d7e7c0dd.zip llvm-3e2631c9c62990467eca3e173f714367d7e7c0dd.tar.gz llvm-3e2631c9c62990467eca3e173f714367d7e7c0dd.tar.bz2 | |
[LoongArch] Optimize codegen for ISD::ROTL (#100344)
The LoongArch rotr.{w,d} instruction ignores the high bits of the shift
operand, allowing it to generate more efficient code using the constant
zero register.
Diffstat (limited to 'llvm/lib/Target/LoongArch')
| -rw-r--r-- | llvm/lib/Target/LoongArch/LoongArchInstrInfo.td | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/llvm/lib/Target/LoongArch/LoongArchInstrInfo.td b/llvm/lib/Target/LoongArch/LoongArchInstrInfo.td index ef647a4..c78820a 100644 --- a/llvm/lib/Target/LoongArch/LoongArchInstrInfo.td +++ b/llvm/lib/Target/LoongArch/LoongArchInstrInfo.td @@ -1123,7 +1123,7 @@ def : PatGprGpr<urem, MOD_WU>; def : PatGprGpr<mul, MUL_W>; def : PatGprGpr<mulhs, MULH_W>; def : PatGprGpr<mulhu, MULH_WU>; -def : PatGprGpr<rotr, ROTR_W>; +def : PatGprGpr<shiftop<rotr>, ROTR_W>; def : PatGprImm<rotr, ROTRI_W, uimm5>; foreach Idx = 1...3 in { @@ -1146,8 +1146,8 @@ def : PatGprGpr<srem, MOD_D>; def : PatGprGpr_32<srem, MOD_W>; def : PatGprGpr<urem, MOD_DU>; def : PatGprGpr<loongarch_mod_wu, MOD_WU>; -def : PatGprGpr<rotr, ROTR_D>; -def : PatGprGpr<loongarch_rotr_w, ROTR_W>; +def : PatGprGpr<shiftop<rotr>, ROTR_D>; +def : PatGprGpr<shiftopw<loongarch_rotr_w>, ROTR_W>; def : PatGprImm<rotr, ROTRI_D, uimm6>; def : PatGprImm_32<rotr, ROTRI_W, uimm5>; def : PatGprImm<loongarch_rotr_w, ROTRI_W, uimm5>; |